Lovera fought for the WBC's vacant world Junior Flyweight title, losing to Luis Estaba.
Lovera was from Fernando de la Mora, Paraguay but he resided in Lambaré during the final years of his life.
Midway through 1975, the WBC desired its world Junior Flyweight champion, Italy's Franco Udella, to defend the title against Lovera.
Lovera then faced 28 wins, 7 losses and 2 draws (ties) with 20 knockouts veteran Luis Estaba for the vacant championship in Caracas, Venezuela, September 13, 1975.
Apparently, WBC officials were unaware that Lovera had no professional boxing fighting experience.